Crimping machine



May 26, 1925. 1,539,326 H. A. PALMER y CRIMPING MACHINE Filed D. s, 1921 5 sheets-sheet 2 May v26, 1925. 1,539,326

H. A. PALMER CRIMPING MACHINE 4"ivii'SdDE:. 8, 1921 5 Sheets-Sheef 5 May 26, 1925.

H. A. PALMER CRIMPING MACHINE Filed D. 8, 1921 5 Sheets-Sheet 4 May 26, 1925. 1,539,326 H. A. PALMER CRIMPING MACHINE Fild'D. 8, 1921 5 Sheets-Sheet 5 Patented May Z6, 1925.

UNITED STATES PATE-NT oFF-lcs.

HARRY A.. PALMER, 0F JACKSON, MICHIGAN, ASSIGNOR TO REYNOLDS .SPRING CQM- `PANY, OF JACKSON, MICHIGAN.

canarino .M AoHINn.

Application `filed December T 0 .all whomwzctg/ concer/17,.'

Be it known that I, HnnnYA. PALMER, a citizen of the United States, residing vat Jackson, in the county `of Jackson and State of lr'lichigan, have invented new and useful Improvements in Crimping Machines, `of which the following` is a specilication.

The invention relates .to a crimping machine. Y

Heretofore .U-'bars rliavebeen secured Yto coiled springs at opposite sides thereof by crimping; .or .compressing the ,LJ-bars .on the coils or convoglntions of the springs but as this operation has been performed manually with a hand tool'thel attachment of the U-bars lto the springs has `not been uniform, owing yto the springs beingnot `equi-distantly spaced .and due to theU-bars being unequally crimped or compressed, resulting yin a laborious operation and an unsatisfactory structure. Also -the crimping vor compressing' of the U-barsisnot always at diamet- Vrically opposite points and Vfrequently through the tir-ing` of .the hand the llbars are not properly crimped l or compressed `and a loose joint or vconnection sometimes results from such defective compressing `or crimping of the U-.bars

The object of the present invention is to provide a sin'iple, practical and etlicient crimpingv machine of strong, durable and (.-oiri-paratively inexpensive construction adapted to obviatefthe `foregoingobjections and to compress U.-bars onto springs land capable of simultaneously and uniformly crimping .or compressing .U-bais at op-posite sides 4of a plurality .of properly spaced springs at the desired points, Idiainetrically oppositeeach other `at the base for other coils or convolutions of the springs, whereby a pair of VtJ-bars is secured to a plurality of springs at opposite sides thereof with requisite acci'i-racy. i

lilith these and other objects in view vthe invention cons-ists -in the yconstnruction and novel combination and'arrangement of .parts hereinafter fully described, illustrated in the acemnpanying drawings and pointed out in .the claims hereto appendechit :beine understood that 'various :changes in 4Vthe forni, proportion and aninor details of construction, within the scope of theclaims, may be resorted to :Without .departing from the s, i921. serial N'p. 521,018.

spirit or sacrificing any 4of the advantages of the invention.

In the drawings, in which like characters i is an enlarged plan View of one side of thecrimping mechanism.

Fig` 5 vis a longitudinal .sectional view of thesame.

Fig. 6 isla transverse `sectional VView on theline 6.-@ of l*`fig5.

Fig. 7 isa plan view of one of the spring supporting members or pegs.

8 is a side elevation f vthe same.

Figs. 9 andl0 vare detail views of the clutchactuat'ing member.

Figs. lll and l2 Yareenlarged plan views of the inner and .outer crimping dies.V

Fig, 13 lis a vertical sectional vien7 of the spring holding-V means illustrating the interior structure thereof and the means 4of inounting;` the same.

Fig'. lelis an enlarged `fragfmentary vien7 illustrating the spring holding means `.and the .diesfor compressing thespring connectingr bars onto the spring..

Fig. 15 is a similar vien7 showing the dies of the crimping ,mechanism in operative position for crimping action.

Figlio is a .honizontalsectional view through `a completed'article showing the spring connecting bars `connected to a row of sprin.gs,-illustrating the result v of operation of the .macl'iine I In the accompanying drawings, in which is illustrated `the preferred embodiment of the invention, ythe .crimping machine ,comprises lin its .construction a'frame composed of yend members l supporting a bed plate 2 and `connected at the 'bottom by ycentrally arranged longitudinal rod 3 and yby a rear lon, 'itudinal shaft or pivot ll, but the frame may be constructcijlninl braced in any .other desired manner will be readily understood and the mach-ine may bemade of any` desired size .and lcapacity `to suit lthechar- Lil acter of spring structures in which the coiled springs and connecting),- U-bars are used. The bed plate, which forms the top oi the machine, is provided at its corners with posts or pedestals 5 extending upwardly and supporting` longitudinal cam shafts 6 and 7 journaled in suitable bearings. 8 of the posts or pedestals and provided at intervals with double cams 9 arranged to simultaneously actuate upper and lower reversely reciproeating` slides 10 and 11 arranged in pairs at opposite .sides of a central spring' supporting member or peg 12, and carrying` inner and outer dies 13 and 111 which are arranged to engage and crimp or compress the U-bars on the base coils or convolutions oit' the springs. Each spring' A is supported by the respective peg 12 in such a manner as to place or suspend the base convolution below the 'peg and between the respective inner and outer dies as shown particularlyin Figs. 1l and 15. The cams, the die, carrying the slides or members, and thevspringg; supporting peg or member constitute a set or" crimping mechanisms and in practice the machine may be equipped with any number ot sets or" such mechanism to provide a machine oit the required capacity, that is,/for the connection ot as many springs as required to the spring supporting and connecting, bars B, one' of said mechanisms for each spring.

As shown in Fig. 16, wherein is embodied one of the produc-ts derived from the present machine, themachine is designed to tasten a row of spaced springs A. to their supporting bars B, the latter being continuous U- shaped stips composed of sheet metal and arranged in pairs to receive opposite sides oit the base convolutions of the springs inj which the base coils are fastened by crimpingl or compressing` the flanges of the bars lirmly onto the base convolutions at opposite sides thereof as evidenced in the linished article illustrated in Fig'. 16. The row'oi springs thus connected to the pair ot bars provides a unit to 'form part ol. an automobile, car, or otherspringr seat structure, The machine illustrated shows but one support in the machine for a spring,` and but one crimping mechanism, but in pra-ctice. a number of springs are mounted in the machine and connected to the U-shaped bars at one operation, to produce such an article as that shown in Fig. 16, depending' upon the length of row desired, but as each individual crimping mechanism and springsupport is the same and arranged in alignment and operated from one and the same means, it has been deemed sutiicient to illustrate the one vsupporting and the one crimping,r mechanism, which is believed sufficient. to disclose the invention without unnecessary duplication of parts. To this end, each crimping mechanism is mounted in a housing across the machine from front to rear and bolted or otherwise secured to the bed plate at the iront and back thereof, as clearly illustrated in Fig. 5 of the drawings. The cams are keyed or otherwise lined to the cam shafts 6 and 7 and each cam is a double caml and is provided at diametrically opposite points with cam portions adapted to simultaneously actuate the said slides 10 and 11 for moving the upper slide inwardly and the lower slide outwardly in the crimping operation. rlhe housing 15 which is provided at the top with cover plates 16 form longitudinal guiding recesses 17 and are provided at the bottom thereot' with supporting ledges 18 and have lower extensions 1S) to receive'reinforcinp ribs or flanges 20 ot the lowerslides 11 (see Fig. 6). The upper slide at each side of the central spring supporting peg or member is arranged upon the lower slide, which is supported upon the said ledges 1S, as clearly illustrated in Fig. 6 of the drawings, and the said upper slide is composed of inner and outer sections 21 and 22, which are connected by a right and left hand threaded adjusting screw 23 having a central enlargementvor operating portion 24 and threaded into suitable sockets 25 and 26 of the inner and outer sections of the upper slide, and the said right and left hand threaded screw 23 is adapted to be rotated to adjust the sections ot the slides toward and from each other toy vary the length of the slide and the position of the die 14 with relation to the die 13. The screw .23 is secured in its adjustment by means oit a lock nut 27 which is mounted on the inner portion of the screw i 23 for engaging'the adjacent end of the inner section 21 of the upper slide, but any other suitable means may, ot course, be employed for securing the adj usting screw and the sections of' the upper slide in its adjustment. The outer section oli the upper slide is biturcated at its outer end to receive an anti-friction wheel 28 which is engaged by the cam 9, and the inner end ot the inner section 2,1 ot' the upper slide 1() is recessed at 29 to receive the die 14 which is provided. at its inner end'with a depending lug,- or :flange 30 fitting in an extension ot the recess 29 and adapted to hold the die againstA relative longitudinal movement whereby when the upper slide is 'assembled and the top plate 16 secured in position, the die 14 will be rigidly connected to the innerend of the upper slide and will move with the same in the operation oli the machine. The die 14 which projects beyond the inner end of the upper slide is provided in its pi'iriectinpY or engaging portion with a groove or recess 231, i'orming approximately rl-shaped wallsv to conform to the configuration ot' the U-bars to be crimped and having its walls lformed by substantially parallel. upper and lower portions and a ChA concave connecting inner portion, as clearly illustrated in Figs. 5, l2 and let of `the drawings.

The cos-acting inner dies J13 is pro-vided in its projecting or enga-ging portion with a substantially `V-shaped recess or groove which forms upper Aand lower inwardly converging walls adapted to engage the sides orllannes ot' the VU-bar :and compress or crimp the same around the coils orco-rivoltitions ot the spriiigs. ,"he die 13 thas 'its inner portion laterally reduced to torm a projecting tongue "(see Fig. 11') and the proiectmgr and engaging portion yot' the coaetine die 14: is centrally recessed at to provide side projecting portions which are located at opposite sides of the 'centrally pipjecting' portion or tongue 33 of the inner die 13 When the dies close .upon "the U-bar in the crimping action ot the machine. In thel crimping yor compressing operation the dies inter-iit and lthe metal .is accurately `and uniformly crimped4 or compressed andthe U-bars are firmly secured to the springs. i

The inner crimpingdie 13 vlits upon ,the inner -e-nd `ot the lower slide, which is provided in the upper face of lits inner end with a dove-tailed reeess36 to .receive adepending dove-tailed flange or rib 37 ot the inner die 13, whereby the inner die 13 is slidaloly interlocked with vthe inner end ot the lon'ersli-de 11. The lower slide 11 which extends beneath and forms a support `tor the upper slide 1,() is approximately "'T-shaped in cross section, as illustrated in `6 ot the drawings, to provide laterally *project- .ingr side portions Vto rest upon the ledges 18 ot the housing '15 and the 'rib or depending; portion 2O extends alone' the lonrlitudiiuifl center ot the upper laterally extendingr portion. The inner end kot the 'lower slide eX- tends upwardly to arrange the upper tace' ot. its inner end in :flush .relation with the upper face ot the recessed inner end otA the upper slide and the lower slide is a so pi iderl at its outer I portion with a curved arm or extension '38 which is located 'beneath the -cam shaft and f the cam 19 and which has its outer terminal portion bifurcated to receive Van antifriction Wheel 39 which is located Adiametri@allv opposite the anti-friction Wheel 28 oi". the upper slide. The cam 9 operates vbetween the anti-'friction n'heels 2S and '39 `and when the cam shattis rotated the 4cam 9 is carried from the posi- `tion illustrated in VFigure `5 of fthe .,draw

ings and rotated through one-halt of a revolution -to move the upper slide inwardly and the 'lower slide .outwardly and thereby compress or `crimp the 4U-'bar of 'the spring. The lower slide is provided in the upper tace ot its central bodyportion with alongitudinal recess 4() lin which is arranged `a coiled spring 41 interposed between-the inner end ol' the longitudinal recess 4e() and a depending projection l2 ot the outer section ot' the ripper slide and adapted -to be cont pressed-by the inward movement Fol fthe upper slide andthe outward movement et `the lower slide and to torce vthe lsaid slides inwardly and-return Vthe same to their int tial position -as'the opposite cani operations ol' the double cam recede in the rotation of the earn shaft. I A

The dies are arranged in pairs at 4opposite sides ot the central spring' supporting- Vpegor member, ywhich is rlnou-nted upon the central portion of fthe housing and which provided at the base With a central recess L13 into which ext-ends the inner portions oit the lower slides of `the set ot crinnping` mechanism. The centr'l spring supportinggr peg `or member 12 is provided at opposite sides ofthorecess it-3 with projecting' ffl-anges or portions 44 which are seated upon the. housing at opposite sides #thereof and-the said housine is provided with a central 'ein cular recess 45 formed" by enlarging; the longitudinal .guide 4and receiving the flower portions 4:6 ot the spring supporting peg or member. The portions i6 4which. yare located at opposite sides ot the recess ffl-3 'have curved or rounded outer faces to conform to the c'onliguration of 'theV central chamber or recess t5 ot the `housingif. The pegor supporting. member 12 is tapered, `4as shown, and it is ada-pt edto vary in Vsize to adapt it* tor supporting the charac-ter of spring to which the llo-,bars are to `be attached Vand Vthe said peg' or Aspringsupporting member is detachably mounted upon the centralpoltion of the housing' and may :be readily removed to ena'blea peeI or supportingv member ot Va diti'efrent size to be ,substituted rllhe vmachine is `preferably equipped at the frontavith 'a guard 47 oit sheet niet al `or other suitable material located at the trent `and top ot' the adiacentcams `and the cani Vshafts are connected at one end oftthe inachine by suitable end gears t8 and 19and intermediate Agears The end gears 4S and 4S) are mounted on tfh'ecam shattsG and 7 and the intermedia-tegears 50, which mesh with each other and With'the gears 453 and 49, are mounted on stub sha-tts or spindles, but any other desired arrangement ot pear! ing or any other suitable 'forni of gearing' inay be employed for transmitt-ino;,motion 'from the rea-r cam shatt 7 to the tro-nt cam shalt 6.. The rear cam shaft 7 receives its motion from a driven pulley or fly Wheel 517 loosely mounted on the rear cam shaft 7 at oneend .thereof and adapted to be clutched to the same by nmeans of a slidableclutch member 5,2 interloclred with the rear cam shaft and actuated y'by a clutch operating; member 58, consisting of a plate or bar secured 'to and carried by one arm of a `bell (ill crank lever 54 and extending` upwardly therefrom as clearly indicated in Fig. 2 of the drawings and having a curved upper portion 55 conforming to the configuration of the slidable clutch section and provided with an inclined engaging edge or face 56 adapted to contact with a stud or projection 57, vcarried by the clutch section 52, whereby when the clutch operating member 53 is moved into engaging position, by the means hereinafter described, the slidable clutch section will be carried out of engagement with the rotating power driven pulley or wheel 51 and willunclutch the rear cam shaft from the same, as hereinafter fully described. Any suitable form of clutch may, of course, be employed and the machine is preferably equipped adjacent the clutch with a band brake 58. The bell c 'ank lever,

`which is fulcrumed at its angle at 59, has an Y upwardly extending arm which carries the clutch operating member and the said lever has its other arm extending forwardly and connected by a link 60 with a rearwardly extending terminal arm 61 of a central rlongitudinal rock shaft 62 journaled in suitable bearings of the end frame members 1 and having a terminal extension on which the arm 61 is mounted, as clearly illustrated in F ig. 2 of the drawings. rfhe central longitudinal shaft 62 is provided with a central forwardly extending arm 63, which is connected at its outer end vby a rod 64 with a treadle consisting of a treadle lever65, pi-voted at its rear end 66 on the lower connecting` rod or pivot 4 and extending forwardly therefrom andprojecting at the front of the machine, as clearly shown in Figure 2 of the drawings. .f The treadle lever is equipped at its front end with a foot plate 67 adapted to be stepped on by the operator to depress the treadle, which carries with it the forwardly extending arm 63 ofthe shaft 62, thereby raising thel rearwardly extending arm 61 andoperating the bell crank lever and the clutch controlling member.`

The slidablo clutch section is spring actuated to move it into engagement with the power driven pulley or fly wheel and the inclined edge of the clutch controlling member is adapted to force the slidable clutch section out of engagement with the power driven pulley or wheel. Vhen the operator steps upon the treadle the upwardly extend,- ing arm of the bell crank lever is moved away from the slidable clutch section and the latter is permitted to engage the power 'driven pulley for rotating the cam shaftsto crimp or compress the U-bars and as soon as the operator removes his weight from the treadle the clutch controlling member is returned to its normal position in engagement with the face of thel slidable clutch section by means of a spring 68 connected with the arm 61 and with the pivot or connecting` rod 4. spring 69 is also connected with the upwardly extending arm of the bellcrank lever 54. Y In the operation ofthe machine the operator retains the pressure on the treadle sutliciently to release the clntrh section and to permit the same to engage the power driven pulley or wheel and he then removes his weight so that the inclined or beveled face or edge of the clutch controlling member will return to its normal position within the path of the stud 57 and engage the same and force the'slidable clutch section out of engagement with the power driven pulley ory wheel, as the cam shaftI completes the required movement. The bandvbrake 5S may be of any desired construction and it may be operated and controlledk by Vany suitable means and its purpose is to reduce the momentum of the cam shaft. The Abrake causes the cam shaft to stop on the center andpre-vents the machine from repeating. The springs and the U- bars may beplaced in the machine separately or may be assembled before placing them intov the machine.

`llhat is claimed isz Y n l. A fcrimping'machine including means for holding a. spring and suspending its base convolution therebeneath, and a crimping mechanism includingl ldies-for operating in the horizontal plane o f said base convolution to crimpa barfonto said base convolution. f

2. A crimping machine including means Vfor holding a spring and suspending the base convolutlon freely therebeneath, and a crimping mechanism including cooperating dies arranged for operation in the horizontal plane of said hase convolution to crimp bars upon opposite sides of the base convolution.

8. A crimpingmachine including means for holding aspring with the base convolution thereofl suspended on opposite sides thereof and therebeneath, and means whereby to compress a sheet metal member intermediate its ends onto the suspended base convolution of the spring to secure said member to the spring. i l

4. A crimping machine comprising spring holding means, a lcrimping mechanism including separate sets ofdies, the dies of each. set being movable toward and away from each other` means constructed and arranged to force the dies of each set toward each other to compress spring supporting bars onto the spring, and means whereby to move the dies of each set away from each other for said compression action.

Ay crimping machine including means for holding a spring, the holding means being provided with, a slot and a ycrimping mechanism including sets of Vcrimping dies, a die of each set operating in the slot of the holding means, one die of each set having projecting and engaging portions pr vided with a` groove and the other die of each set being provided with a projecting portion movable between the spaced portions of the companionl die and providedl with a groove.

6. A crimping.mechanism including means for holding a spring, crimping mechanism arranged to carry and to compress a springsupporting bar onto the spring, including.

sets ot dies, the dies of each set being movable toward and away tronieach other, and a cam mechanism for actua-ting the crimping mechanism. f

7. A crimpin g machine comprising spring holding means-,a crimping mechanism including upper and lower slides` having opiositely disposedportions, opposite dies carried by the slides and movable Vtoward and away from eachother and arranged to compress a spring sumiortingy bar intermediatey its ends directly ontoK a spring, and-a double cam located between the opposite portions ot the slides .for simultaneously movingthe same in opposite directions.

t3.` A crimping machine, comprisingspring holding means, an upper slide, a lower slide supylportingl the upper slide and having. a tern'iinal extension spaced from one end oi. the upper slide, a camY operating between said extension `and the upper slide, and dies carried by said slides.

t); A crimping machine coi-nprising means tor holding a spring, a crimping mechanism intnluding slides,- dies carried by the slides Vand movable toward and away from each other, one of the dies adapted to carry a spring. supporting bar and a. cam for engaging the slides to move the dies in one direction to eillect a crimping of the. said bar onto the spring, and spring interposed be tween the slides for moving the dies in the opposite direction` aIter the crimping operation.

10. A crimping machine including means for holding a spring withthe lower convolution of the spring spaced from the holding means,` a crimping mechanism including an upper set ot' slidesand a lower set oit slides, the former being slidable upon the latter, dies carried at the inner ends olf the lower slides and slidable with the latter under the spring supporting means and within the lower convolution of the spring, dies farried by the inner ends of the upper slides and movable `toward and away 'from the lower convolution of the sijiring in horizontal alinement. with` the aforementioned dies andy constructed to carry spring.: supporting bars.y and means constructed and arranged andv operatively connected to said slides to move the same in oppositeV directions toward each other to carrysaid bars to the lower convolution ot' said spring and crimp the bars onto the lower convolution of the spring.

11. A crimping machine including means tion ot the spring spaced` from the holding n'1eans-,a crimping mechanism: including au upper set of slides and a lower set of slides,` the former being slidable upon the latter, dies carried at the inner enc s of thev lower, slides and slidable with the latter under the spring supporting means and` within the loi-ver convolution ot the spring, diescarried l by the inner endspf the upper slides and' movable toward and away from the lower convolution ot the spring in horizontalalinement with the aforementioned dies and constructed to carry spring supporting bar-s, and al double cam mechanism arranged to move the sets of dies toward each other to carry the bars to the lower convolution. of the spring and compress the harsen-opposite sides of they spring. n

12. A crin'iping machineincludingmeans :tor holding a spring with. the lower convolution ot the spring spaced from the' holding nie-ans,V a crimping. mechanism' including an upper set of` slides and a lower set oli'- slides, the 'former being slidable upon the latter,` diesV carried at the inner ends of' thel lower slides andv slidazble with the latter under the spring supporting means and within the lower convolution of the spring, dies carried by the inner ends of the upper slidesy and .movable towardand away from the lower convolution of the spring in horizontal alinement withthe aforementioned dies andconstr-urteilte carry spring supporting bars, and means constructed and arranged and operatively connected to said slidesito move the same in opposite directions toward each other to carry said bars to the lower convolu tion o't said spring and` crimp the bars onto the lower convolution of the spring, and a spring connectionbetween each set of upper and lower slides whereby to return the slides to normfal. position a-tter the compressing oporation.

13. A crimping machine including-means 'for holding a spring with the lower convolu` tion of the spring spaced from the holding means, acrimping mechanism including an upper set ol slides and a lower set of slides, the lormer being slid-able upon the latter, dies carried at the .inner ends of the lower slides and slidable with the latter underthe spring supportingl means and within the lower convolution oi the spring, dies carried by the inner ends oi? the upper slides and movable towardl and away from the lower convolution of the spring in horizontal alinement with the aforementioned dies and constructed to carry springsupporting bars, and a double cam mechanism arranged to move the sets of dies toward each other to carry the bars to the lower' convolution of the spring .andcompress the bars on opposite .sides of the spring, and a spring con! nection between each set of upper and lower slides whereby to return the slides to normal position after the compressing operation.

14. A crimping machine including spring holding means, slides loc-ated at opposite sides of the spring holding means and provided at their inner ends with dies, cam shafts extending longitudinally of the machine and located at the outer ends of the slides, rollers carried 'by the outer ends of the slides, a gear mechanism between said cam shafts, and cams on the cam shafts located between the respective rollers of the slides for actuating thelatter.

l5. A crimping machine, including spring holding means, slides located at oppositel sides of the said means and provided at their inner ends with dies, cam shafts eX- tending longitudinally of the machine and located at the outer ends of the slides, gearing connecting the cam shafts and arranged at one end of the machine, and cams on the cam shafts for actuating the slides.

16. A crimping machine including Spring holding means, slides located at opposite sides of the spring holding means and provided at their inner ends with dies, cam shafts extending longitudinally of the machine and arranged at the outer ends of the slides, cams mounted on the shafts for actuating the slides, gearing' connecting the cam shafts, a power wheel mounted on one of the cam shafts, a movable clutch member for clutching' the power wheel to thle said cam shaft, and means for operating the clutch member.

17. A crimping machine, including spring holding means, slides located at opposite sides of the spring holding means and provided at their innerends with dies, cam shafts extending longitudinally of the machine and arranged at the outer ends of the slides, cams mounted on the shafts for actuating the'slides, gearing connecting the cam shafts, a power wheel mounted on one of the cam shafts, a movable clutch member for clutching the power wheel to the said cam shaft, and means for operating the clutch member,- said operating means comprising a projection on said clutch member and a controlling member movable into and o ut of the path of the projection and having an inclined edge for engaging the same to move the clutch member away from the power wheel.

1S. A crimping machine, including spring holding' means, slides located at opposite sides of the spring holding means and provided at their inner ends with dies, cam

Vshafts extending longitudinally of the machine and arranged at the outer ends of the slidesl` cams mounted on the shafts for actuating the slides, gearing connecting the cani shafts, a power wheel mounted on one of the cam shafts, a movable clutch member for clutching the power wheel to the said cam shaft, and means for operating the clutch member, said operating-means comprising a projection carried by the clutch member, a bell-crank lever having a clutch controlling member movable into and out of the path of the said projection and provided with an inclined edge for engaging the same to move the clutch member away from the power wheel, a rock-shaft connected with the bell-crank lever, a pedal for operating the rock-shaft, and a spring connected with the rock-shaft forreturning the operating' mechanism to its initial position.

19. A .crimping mechanism including means for holding a spring with its lowerconvolution free, a set of dies slidable within the lower convolution of the spring toward and away from opposite sides thereof, a set of dies exterior of the spring, one on each side thereof and opposite therespective aforesaid-dies and slidable in cooperative alinement with the aforesaid dies and constructed to carry spring supporting bars, means for sliding said sets of dies toward each other to place the bars adjacent to the lower convolution of the spring and to'eifect a compression of the bars onto the spring, and means for moving the sets of dies away from each other after-the compression operation.

20. A crimping mechanism including means for holding a spring with its lower convolution free, a set of dies slidable within the lower convolution of the spring toward and away from opposite sides thereof, a set of dies exterior of the spring, one on each side thereof and opposite the respective aforesaid dies and slidable in cooperative alinement with the aforesaid dies and constructed to carry spring supporting bars, means for sliding said sets of dies toward each other to place the bars adjacent to the lower convolution of the spring and to effect a compression of the bars onto the spring. l

21. A crimping machine, including means for holding a spring with its lower convolution free, a set of dies slidable toward and away from each other into and out of engagement with the inner sides of the lower convolution of the spring, dies constructed and arranged to hold and present spring supporting bars to opposite sides of the lower convolution of the spring and to coact with the nist-mentioned dies to compress the spring supporting bars onto the lower convolution of the spring, and means for operating the aforesaid dies to effect said compression action.

Q2. A crimping machine, including means for holding a Spring with its lower convolution free. a set of dies slidable toward and away from each other into and out of engagement with the inner sides of the lower convolution of the spring, dies constructn ed und arranged to hold und present Spring supporting bars to opposite sides or" the lower convolution of the spring and to co-act with `the first mentioned dies to compress the spring supporting;` bars onto the lower convolution of the Springs, and cam mechanism to operate said dies to effect said comn pression action.

23. A crimping machine including means for holding` a spring and suspending its base convolution therebenezith, and a crimping` mechanism arranged to crimp a sheet metal U-har into embracing relation with said base convolution.

In testimony whereof I have hereunto set my hand.

HARRY A. PALMER. 

